Ok , so took the Taco into the dealer yesterday so they could complete TSB-0249-12 to address the driveline vibe from a dead stop .
Dealer installed part number 12371-31250 - insulator, engine . Read rear trans mount ...
Mechanic stated on paperwork that the vibe was gone - wrong numbnuts ! It is still there , albeit a bit less . Plan to return a call to the service writer today for a follow-up .
Personally, I think it's mostly the damned springs on the rear axle , a classic symptom of spring wrap deflecting the pinion angle upwards and causing the driveshaft to bind the u-joints . This truck does have the stupid 3-leaf packs which ride ok at best , haven't had a chance to do a good load test yet but will one way or another this week . The Tacoma world forum has an extensive library of posts dealing with those rear springs and seems like if you complain enough they will replace them with a 4-leaf pack . BTW, this happens at 1/4 or more throttle input , basically normal everyday driving in traffic .
Anyone else have any feedback on this issue ?
It almost feels like a trans shudder at takeoff , but it's not . No evidence of burnt fluid , ect and it works great if you just stab the throttle , or just burn the tires ...
I do have an idea , maybe I'm nuts here but ....
How about taking a GoPro cam with a good clamp mount and taking a shot of the pinion angle change as the springs load up under acceleration ? It would at least prove my theory and offer video proof of a weak spring design so at least others would have more ammo to work with against the manufacturer . Getting sick of poorly designed vehicles that these big companies produce with known issues and their habit of blowing customers off to save money to maximize profits . Would never expect this of the Japanese but welcome to our "modern world" .
Just as a backround note -
I've built some pretty serious dual-purpose 4x4's in my life - the last was a 10" lifted Samurai on 33's , sprung-over leaf springs . Had the same issue at takeoff under even light throttle - the springs would s-bend and change the pinion angle severely enough it actually bent a set of springs . Made up a new pack and installed a 5th arm style anti-wrap bar , problem solved and wheeled the snot out of while a daily driver (read ONLY driver) for nearly 10 years and 130,000 miles . 40" of articulation at all four corners so I do have some experience here .
Love to hear what others have done , what do you folks think about the camera idea ?
Sarge
Dealer installed part number 12371-31250 - insulator, engine . Read rear trans mount ...
Mechanic stated on paperwork that the vibe was gone - wrong numbnuts ! It is still there , albeit a bit less . Plan to return a call to the service writer today for a follow-up .
Personally, I think it's mostly the damned springs on the rear axle , a classic symptom of spring wrap deflecting the pinion angle upwards and causing the driveshaft to bind the u-joints . This truck does have the stupid 3-leaf packs which ride ok at best , haven't had a chance to do a good load test yet but will one way or another this week . The Tacoma world forum has an extensive library of posts dealing with those rear springs and seems like if you complain enough they will replace them with a 4-leaf pack . BTW, this happens at 1/4 or more throttle input , basically normal everyday driving in traffic .
Anyone else have any feedback on this issue ?
It almost feels like a trans shudder at takeoff , but it's not . No evidence of burnt fluid , ect and it works great if you just stab the throttle , or just burn the tires ...
I do have an idea , maybe I'm nuts here but ....
How about taking a GoPro cam with a good clamp mount and taking a shot of the pinion angle change as the springs load up under acceleration ? It would at least prove my theory and offer video proof of a weak spring design so at least others would have more ammo to work with against the manufacturer . Getting sick of poorly designed vehicles that these big companies produce with known issues and their habit of blowing customers off to save money to maximize profits . Would never expect this of the Japanese but welcome to our "modern world" .
Just as a backround note -
I've built some pretty serious dual-purpose 4x4's in my life - the last was a 10" lifted Samurai on 33's , sprung-over leaf springs . Had the same issue at takeoff under even light throttle - the springs would s-bend and change the pinion angle severely enough it actually bent a set of springs . Made up a new pack and installed a 5th arm style anti-wrap bar , problem solved and wheeled the snot out of while a daily driver (read ONLY driver) for nearly 10 years and 130,000 miles . 40" of articulation at all four corners so I do have some experience here .
Love to hear what others have done , what do you folks think about the camera idea ?
Sarge
